About BukuWarung

BukuWarung is building the financial and digital nervous system for millions of underserved merchants. Payments, credit, software, commerce, money management - all converging into one integrated platform.

We are not building features. We are building infrastructure that small businesses depend on to survive.

If you have ever wanted to design systems that matter at scale (not ad-tech dashboards, not incremental UI improvements) but real, high-volume, reliability-sensitive, multi-country platforms, this is that opportunity.

The Mission

We are entering a critical phase of growth. Velocity is improving. AI is accelerating development. But before acceleration, we need architectural depth.

We are looking for a Staff Engineer who cares deeply about:

• Designing systems that scale 10x and 100x

• Failure domains and blast radius reduction

• High availability and reliability engineering

• Clean abstractions and long-term maintainability

• Architecture that enables speed, not blocks it

What You Will Do

• Lead architecture, design for high-scale systems across payments, EDC, credit, and merchant platforms

• Design for multi-region expansion and high transaction volumes

• Establish and elevate system design review standards

• Drive platform thinking across squads

• Identify scaling bottlenecks before they hurt

• Reduce operational burden through thoughtful abstractions

• Mentor engineers and grow them

• You will work directly with engineering leadership and influence product decisions where system design matters.

What We’re Looking For

• 8+ years building and scaling backend distributed systems

• Deep understanding of system design fundamentals (consistency models, caching strategies, event-driven architecture, fault tolerance, data modeling at scale)

• Experience with microservices and/or modular monolith architectures

• Hands-on expertise with cloud infrastructure (AWS preferred)

• Strong intuition for performance tuning and observability

• Comfort operating in ambiguity while raising engineering bar

Bonus Points

• Experience in fintech or transaction-heavy platforms

• Experience scaling systems across regions

• Prior Staff/Principal-level impact in high-growth environments

What Makes This Role Different

At large tech companies, you optimize a slice of a mature system. Here, you will shape the spine.

Your decisions will influence how millions of merchants experience financial services. You will help define how engineering thinks about scale as a culture, not just as code.

If you are someone who:

• Thinks in systems, not just services

• Gets uncomfortable when architecture feels fragile

• Enjoys whiteboarding failure scenarios more than debating frameworks

• Wants ownership beyond tickets

Then this role will stretch you.

If you’re excited by scale, complexity, and building something enduring, let’s talk.

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